Geometry Crossword puzzle

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Across
  1. 1. something with a length
  2. 5. The position of a point by its distance from two or more
  3. 7. A polygon with 6 sides
  4. 9. has an start point but no endpoint
  5. 12. exact location of an space
  6. 15. A triangle having no two sides equal
  7. 17. A triangle in which at least two sides are congruent
  8. 18. Two or more straight coplanar lines that don't intersect
Down
  1. 2. An angle that measures 90 or pie/2
  2. 3. The point of the line
  3. 4. a distance between two points
  4. 6. The line segment from a vertex of a triangle to the midpoint of the opposite side
  5. 8. A line that intersects two or more lines
  6. 10. two dimensional shape with 4 equal sides
  7. 11. the figure formed by two rays from the same initial point
  8. 13. A five-sided plane
  9. 14. A eight-sided polygon
  10. 15. Part of a line or curve between two given points
  11. 16. An angle with measure between 0 and 90 degrees